组合FRP技术改善混凝土矩形柱的抗剪性能试验研究
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摘要
进行利用植筋及FRP(纤维增强复合材料)布加固钢筋混凝土矩形柱以提高抗剪性能增强延性的新型加固技术研究。通过5个钢筋混凝土方柱的模型试验,分别研究植GFRP(玻璃纤维)筋、横向包裹CFRP(碳纤维)布及两者组合的加固技术对提高混凝土矩形柱抗剪性能的作用,分析讨论不同加固方法对混凝土矩形柱位移延性系数提高、刚度退化及能量耗散能力的影响。试验结果表明,采用植GFRP筋和包裹CFRP布的组合加固技术较前两种加固方法能更加有效地改善钢筋混凝土矩形柱的抗剪性能。
A new strengthening method for improving the shearing behavior of rectangular reinforced concrete columns,in which the embedded bars and FRP(fiber-reinforced-polymer)sheets are used in the strengthening area,is studied.Five reinforced concrete square columns were tested to examine the function of embedded GFRP(glass FRP)-bars,wrapped CFRP(carbon FRP)sheets and their hybrid effects on shearing behavior,increase of displacement ductility ratio,stiffness degradation,and energy dissipation.Test results show that the new strengthening method of embedding GFRP-bars and wrapping CFRP sheets is effective to improving the shearing behavior of rectangular concrete columns compared with the other two methods.
A new strengthening method for improving the shearing behavior of rectangular reinforced concrete columns,in which the embedded bars and FRP(fiber-reinforced-polymer)sheets are used in the strengthening area,is studied.Five reinforced concrete square columns were tested to examine the function of embedded GFRP(glass FRP)-bars,wrapped CFRP(carbon FRP)sheets and their hybrid effects on shearing behavior,increase of displacement ductility ratio,stiffness degradation,and energy dissipation.Test results show that the new strengthening method of embedding GFRP-bars and wrapping CFRP sheets is effective to improving the shearing behavior of rectangular concrete columns compared with the other two methods.
引文
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[6]Priestley M J N,Seible F.Design of seismic retrofit measures for concrete and masonry structures[J].Construction and Building Materials,1995,9(6):365-377
[7]Iacobucci R D,Sheikh S A,Bayrak O.Retrofit of square concrete columns with carbon fiber-reinforced polymer for seismic resistance[J].ACI Structural Journal,2003,100(6):785-794
[8]Xiao Y,Ma R.Seismic retrofit of RC circular columns using prefabricated composite jacketing[J].Journal of Structural Engineering,ASCE,1997,123(10):1357-1364
[9]Bousias S N,Triantafillu T C,Fardis M N,et al.Fiber-reinforced polymer retrofitting of rectangular reinforced concrete columns with or without corrosion[J].ACI Structural Journal,2004,101(4):512-520
[10]Liddell D P,Ingham J M,Davidson B J.Influence of loading history on the ultimate displacement of ductility6-current design concrete structure[C]//Proceedings of Australian Structural Engineering Conference.Gold Coast,Australia,2001:231-238
[11]Liddell D P.Influence of loading history on ultimate displacement of concrete structures[D].New Zealand:University of Auckland,2000
[12]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001
[2]刘涛,冯伟,张智梅,等.纤维增强复合材料(FRP)加固混凝土柱研究进展[J].工业建筑,2006,36(S1):1004-1008(Liu Tao,Feng Wei,Zhang Zhimei,et al.Retrofitting and strengthening of concrete columns with FRP:a state-of-the-art review[J].Industrial Construction,2006,36(S1):1004-1008(in Chinese))
[3]李忠献,许成祥,景萌,等.碳纤维布加固钢筋混凝土短柱的抗震性能试验研究[J].建筑结构学报,2002,23(6):41-48(LiZhongxian,XuChengxiang,JingMeng,etal.Experimental research on seismic behavior of reinforced concrete short columns strengthened with carbon fiber sheets[J].Journal of Building Structures,2002,23(6):41-48(in Chinese))
[4]赵彤,周晓杰,谢剑,等.用碳纤维布改善钢筋混凝土极短柱抗震性能的试验研究[J].地震工程与工程振动,2002,22(1):85-91(Zhao Tong,Zhou Xiaojie,Xie Jian,et al.Research on improving seismic behavior of reinforced concrete short columns with continuous carbon fiber sheet[J].Earthquake Engineering and Engineering Vibration,2002,22(1):85-91(in Chinese))
[5]张轲,岳清瑞,叶列平,等.碳纤维布加固混凝土柱改善延性的试验研究[J].工业建筑,2000,30(2):16-19(Zhang Ke,Yue Qingrui,Ye Lieping,et al.Experimental research on ductility improvement of concrete columns strengthened with CFS[J].Industrial Construction,2000,30(2):16-19(in Chinese))
[6]Priestley M J N,Seible F.Design of seismic retrofit measures for concrete and masonry structures[J].Construction and Building Materials,1995,9(6):365-377
[7]Iacobucci R D,Sheikh S A,Bayrak O.Retrofit of square concrete columns with carbon fiber-reinforced polymer for seismic resistance[J].ACI Structural Journal,2003,100(6):785-794
[8]Xiao Y,Ma R.Seismic retrofit of RC circular columns using prefabricated composite jacketing[J].Journal of Structural Engineering,ASCE,1997,123(10):1357-1364
[9]Bousias S N,Triantafillu T C,Fardis M N,et al.Fiber-reinforced polymer retrofitting of rectangular reinforced concrete columns with or without corrosion[J].ACI Structural Journal,2004,101(4):512-520
[10]Liddell D P,Ingham J M,Davidson B J.Influence of loading history on the ultimate displacement of ductility6-current design concrete structure[C]//Proceedings of Australian Structural Engineering Conference.Gold Coast,Australia,2001:231-238
[11]Liddell D P.Influence of loading history on ultimate displacement of concrete structures[D].New Zealand:University of Auckland,2000
[12]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001
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